Improved car-brake



ing as guides for vthe vertically-re UNITED- STATES PATENT 'EEICE.

vDAVID MYERs, or CHICAGO, ILLINoIs.

IMPROVED CAR-BRAKE;

:Snecifiationmingpart'o'f l'mttors Patent No. 52,311. dated January 30, 1866.

To allwiiom #may Conad' Beit knownl vthat I, DAVID -'MYERs, of the city of Chicagolein the; county ot' Cook and State oflllinois, have invented a new and use- .ful Improvementi'i-.in Operating Car-Brakes;

andl do hereby declare th'ati'the following is a full, clear, and exactdiscription of thee-same,

. `referen ce being had -tofft ie accompan yin g drawings and the letters and figures marked thereon, which form part of this specification. i

My said invention consists in a novel device `"Lobe attached to each ear composing a train,

whereby the brakes upon all the cars may be readily and simultaneously operated by tension upon a chain extending throughout the entirelength of the' train, which tension may 'be applied to ner.

To enable thoseskille'd in the art to undersaid chain in any suitable man-V "s'tandthe nature, "construction, "and ope'ratirr' moved to show the interior and operating parts; and Fig of 'thesa'me Similar letters of reference in the several 3;shoWs a frontor back View 'iigresdenote the same parts of my invention.

JA/A represent two metallicJ plates inclusing the operatingparts andvforming bearings for the shafts supporting them, and'also serv ciprocating block. -(Marked B.) n

In a sui table slot or recess in the lower end of said block B there is arranged a pulley or roller, (marked G,).whose""shaft or axle has its 'bearingjin the said block, and at each of the upper enrnersthereof are arranged in a similar manner two smaller'pulleys, (marked ,b b,') the recesses in which said last-mentioned pulleys are` placed, being large enough to allow the levers' marked C G to pass up through the sanie,-behin'd said pulleys or rollers b b, as shown. The said levers are pivoted or have their' fulcrums at c, which pivots or bolts have their supports in the side or guide plates, A A, and "the levers'passing up through the receses i-n said blockB extend up, as-shown, to the'up' the person Whose duty release the brakes.

Whenthe steam is shut off at the engine per ends ot' which are attached the brake-rods C C, a s shown.,

d d represent two pu upon either side-the shafts upon which they revolve being supported vin the side plates, A A. Y

The-upper ends of the said levers C arc surrounded by the linkv marked a, which allows said levers to, approach cach other, but not to -fall backfarther than thelimits of thc said link.

F represents ythe chain extending through the train, passing over the rollers d d and he- 'ment may b'e se'cured to the bottom of the cars by bolts or any other suitable fastenings.

Having-described the construction of my invention, l will now Adescribe the operation of the same: When 'tensionis applied to the chainv F the effect is to raise the sliding block B, which movement, by the action of the rollers b, b upon the exterior of said levers C, throws the upper ends of said levers together, and thus, by means of the brake-rods C C', applies thebrakes 'E E to the wheels of the car, as shown, and thus by placing said device upon each car the entire train may be readily and simultaneously checked and released by it may be to apply or preparatory to stopping the train, the cars are run together behind by their own momentum, and 'the chainF becomes. slack, all of which slack has to be takenlnp on the shaft of the friction-Wheel before the brakes can be applied to the various cars composing the train,

butwhen the brakes are applied and the chaini- F is -taut the effect of the brakes upon the cars is to draw thecars apart to the extent of the slack in the couplings, lwhich would thus bring the whole draft of the train upon t-hc lleysarranged,asshown,

chain F and break it. Myinvention obviates the' ends of the levers in space, while the this danger. The .power is applied to the 1e. bpower exertedl upon the brakes is very great.A vers C C at the point of' contact between said Thus a movement of about half the possible levers and the rollersb 11,' which is variable,l as height to which said block B mayl ascend the block B is moved. upward. At the outset operates the brakes successfully and with su- 4 .the power is applied at a point very near the cient pressure, and yet theA said block may be fulcrum, and consequently a slight motion at forcedup tothe full height Without hinderance the point ofthe application of `the powerrwill'- Ashould lthe lengthening'outof the slack in the cause Vthe end of theupper or long arm of the couplings,'as aforesaid, require the chain F' levers to .move through a space correspond- ,to yield in order to bring the draft upon the ingly longer in the ratio ofthe long'audshort couplings and take'it off from said chain. l arms to Veach other, Whilel the ,force exerted Having' described the construction and operupon thev brakero'ds C' C 'jwould bec/orr'eation ofmyinventioml will now specify what spondingly slight, yet sulcient to take up the II claim and desire to secure by Letters Patenti i `slack motion between the brakes and the '1.. The employment ofthe levers() C', arwheels. Thus aver-tical motion ot' the block-4 rangedand operating substantially as and for B through a small part ot its -possiblecles'faf fthe purposes hereinspecified and shown@ tion will-bring the brakesin contact withl the l` -'f. The combination of said levers C U-with Wheels. lBut the farther the. said bloek .isl the 'slidinggbl'ock-B,.arrangedand'operatiug moved -u-p,..the less space is passedwoyer by the substantially@ and for the purposes shown upperends of s'ad`lers by thesamevertical'.;i1'd;described.. i K- i -i v yD/AVID.: MYERS.

motion ofthe block, While at the same t'iin the force" exerted upon the brakes liscorre;

spndiugly increased, until4 atithe :upperfparty Witnessfes:2,l lof its path' the vertical motiongof Vsaid. block44 l i COBURN, B producesan almost imperceptible 'xnotionjof- MARES. 

